DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-1120; Product Identifier 2017-CE-030-AD; Amendment
39-19244; AD 2018-07-13]
RIN 2120-AA64

Airworthiness Directives; Textron Aviation Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Textron Aviation Inc. Models 510, 680, and 680A airplanes equipped with
certain part number brake assemblies. This AD was prompted by a report
that brake pad wear indicator pins were set incorrectly, which could
lead to brake pad wear beyond the acceptable limits without indication.
This AD requires inspection of the brake pad wear indicator pins and
replacement of the brake assembly if any pin is set incorrectly. We are
issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective May 15, 2018.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of May 15, 2018.

ADDRESSES: For service information identified in this final rule,
contact Textron Aviation Inc., One Cessna Boulevard, P.O. Box 7704,
Wichita, Kansas 67277; phone: 316-517-6215; email:
citationpubs@txtav.com; internet: https://support.cessna.com/custsupt/csupport/newlogin.jsp; or UTC Aerospace
Systems, Goodrich Corporation,
101 Waco Street, P.O. Box 340, Troy, Ohio 45373; phone: 937-339-3811;
email: awb.techpubs@utas.utc.com; internet: https://www.customers.utcaerospacesystems.com/. You may view this service
information at the FAA, Policy and Innovation Division, 901 Locust,
Kansas City, Missouri 64106. For information on the availability of
this material at the FAA, call (816) 329-4148. It is also available on
the internet at http://www.regulations.gov by searching for and
locating Docket No. FAA-2017-1120.

Examining the AD Docket

You may examine the AD docket on the internet at http://www.regulations.gov
by searching for and locating Docket No. FAA-2017-1120; or in person at Docket
Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this final rule, the regulatory evaluation, any
comments received, and other information. The address for Docket Operations
(phone: 800-647-5527) is U.S. Department of Transportation, Docket Operations,
M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE,
Washington, DC 20590.

FOR FURTHER INFORMATION: CONTACT ONE OF THE FOLLOWING:
For the Model 510: David Enns, Aerospace Engineer, Wichita
ACO Branch, FAA, 1801 Airport Road, Room 100, Wichita, Kansas 67209;
phone: 316-946-4147; fax: 913-946-4107; email: david.enns@faa.gov; or
For the Models 680 and 680A: Adam Hein, Aerospace
Engineer, Wichita ACO Branch, FAA, 1801 Airport Road, Room 100,
Wichita, Kansas 67209; phone: 316-946-4116; fax: 316-946-4107; email:
adam.hein@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would apply to certain Textron Aviation
Inc. (Textron) Models 510, 680, and 680A airplanes equipped with brake
assemblies, part numbers (P/Ns) 2-1706-1 and 2-1675-1, with certain
serial numbers. The NPRM published in the Federal Register on December
11, 2017 (82 FR 58140). The NPRM was prompted by a report that brake
pad wear indicator pins were set incorrectly, which could lead to brake
pad wear beyond the acceptable limits without indication. Brakes
overhauled by UTC may have wear indicator pins set longer than
specified. UTC discovered this condition during their inspection of
incoming brakes. This condition, if not corrected, could result in
brake pad wear beyond the acceptable limits without indication and
consequent loss of braking ability, which could lead to a runway
excursion. We are issuing this AD to address the unsafe condition on
these products.

Comments

We gave the public the opportunity to participate in developing
this final rule. The following presents the comments received on the
NPRM and the FAA's response to each comment.

Request Clarification for FAA-Approved Replacement Instructions

Mark Mitcheson of NetJets Aviation requested specifics on ``FAA-
approved replacement instructions approved specifically for this AD.''
We infer he wants clarification of the intent of this statement.
We agree that the language quoted by the commenter and used in the
NPRM was confusing. We intended to direct those responsible for
complying with the requirements of the AD to the type certificate
holder, in this case Textron Aviation Inc., to obtain the replacement
instructions (i.e., maintenance manuals) specific to the applicable
airplane models affected by this AD.
We modified in this AD the language quoted by the commenter to more
accurately reflect our intent.

Request Parts Installation Prohibition

Mark Mitcheson requested whether the AD should prohibit the
installation of the affected parts.
We partially agree. We agree operators should avoid installing the
affected part because parts that do not meet type design could
introduce the unsafe condition onto the airplane. However, we disagree
with adding a specific requirement to the AD prohibiting the
installation of the affected part. This AD requires inspection of the
installed affected parts, and, if an affected part is installed, the
airplane will immediately be subject to the requirements of this AD.

Conclusion

We reviewed the relevant data, considered the comments received,
and determined that air safety and the public interest require adopting
this final rule with the change described previously and minor
editorial changes. We have determined that these changes:
[Agr]re consistent with the intent that was proposed in
the NPRM for addressing the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.
We also determined that these changes will not increase the
economic burden on any operator or increase the scope of this final
rule.

Related Service Information Under 1 CFR Part 51

We reviewed UTC Aerospace Systems Service Bulletin 2-1706-1-32-1,
Revision 1, dated July 18, 2017; and UTC Aerospace Systems Service
Bulletin 2-1675-32-2, Revision 1, dated July 18, 2017. For the
applicable models, the service information identifies the affected
serial number brake assemblies and describes procedures for inspecting
the wear indicator pins. This service information is reasonably
available because the interested parties have access to it through
their normal course of business or by the means identified in the
ADDRESSES section. These UTC service bulletins are included as
attachments with the Textron service letters discussed in the Other
Related Service Information paragraph.

Other Related Service Information

We also reviewed Textron Aviation Inc. Service Letters SL510-32-08,
SL680-32-15, and SL680A-32-05, all dated July 21, 2017. For the
applicable airplane models, these service letters direct the operators
to use Goodrich Service Bulletins 2-1706-1-32-1 and 2-1675-32-2.
However, the Goodrich Service Bulletins that the Textron Aviation Inc.
Service Letters refer to and intend for operators to use are titled UTC
Aerospace Systems Service Bulletin 2-1706-1-32-1, Revision 1, dated
July 18, 2017; and UTC Aerospace Systems Service Bulletin 2-1675-32-2,
Revision 1, dated July 18, 2017. The UTC Aerospace Systems service
bulletins are included as attachments to the Textron service letters.

Costs of Compliance

We estimate that this AD affects 668 airplanes of U.S. registry.
We estimate the following costs to comply with this AD:

Estimated Costs

We estimate the following costs to do any necessary replacement
that would be required based on the results of the inspection. We have
no way of determining the number of airplanes that might need these
replacements:

On-Condition Costs

According to the manufacturer, the costs of this AD may be covered
under warranty, thereby reducing the cost impact on affected
individuals. We do not control warranty coverage for affected
individuals. As a result, we have included all costs in our cost
estimate.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
This AD is issued in accordance with authority delegated by the
Executive Director, Aircraft Certification Service, as authorized by
FAA Order 8000.51C. In accordance with that order, issuance of ADs is
normally a function of the Compliance and Airworthiness Division, but
during this transition period, the Executive Director has delegated the
authority to issue ADs applicable to small airplanes, gliders,
balloons, airships, domestic business jet transport airplanes, and
associated appliances to the Director of the Policy and Innovation
Division.

Regulatory Findings

This AD will not have federalism implications under Executive Order
13132. This AD will not have a substantial direct effect on the States,
on the relationship between the national government and the States, or
on the distribution of power and responsibilities among the various
levels of government.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979),
(3) Will not affect intrastate aviation in Alaska, and
(4) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec. 39.13 [Amended]

2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive (AD):